IASSC

Independent Lean Six Sigma certification exams

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Free option: None listed
Pricing: Price on request
Delivery: Online

The lean-stack take

For a lean practitioner it gives a way to certify Lean Six Sigma knowledge apart from any single course. A team can train with any provider, then sit IASSC exams for Yellow, Green or Black Belt.

Best for

Practitioners and employers who want a Lean Six Sigma certificate that is separate from the training provider.

Watch out for

IASSC certifies through exams only, so plan and budget for training from a separate provider.

About

About IASSC

IASSC, the International Association for Six Sigma Certification, offers Lean Six Sigma certification exams. It does not run the training itself; it certifies knowledge through exams and accredits training providers.

Written by lean-stack from IASSC's public pages. Vendors can replace it with their own description by claiming this profile.

Features

What IASSC offers

Belt certifications

IASSC offers Yellow Belt, Green Belt and Black Belt certification exams, covering DMAIC and Lean Six Sigma tools at each level.

Lean-only certifications

Separate Lean Practitioner, Lean Leader and Lean Expert certifications are listed for people focused on lean rather than Six Sigma statistics.

Body of Knowledge

IASSC publishes a Lean Six Sigma Body of Knowledge that sets out what each exam covers, which helps candidates plan study.

On-demand web testing

Exams can be taken through on-demand web-based certification testing, so candidates do not need to travel to sit them.

Provider accreditation

IASSC accredits training organizations, curriculum providers and training associates, and lists them on its site.

Verification and recertification

Employers can verify a certification on the IASSC site. A recertification program and recertification exam vouchers are also offered.

Evaluation exams

The order site sells evaluation exam vouchers, such as a Green Belt evaluation exam, alongside the certification exams.

Lean techniques supported

The lean practices IASSC is built to support.

Pricing

IASSC pricing

Checked October 19, 2026

Starting price

Price on request

Pricing: Price on request
Free option: None listed

How pricing works

Exams are bought as per-level vouchers on the IASSC order site; fees were not confirmed in this check.

Exams are bought as vouchers per belt level on the IASSC order site. Separate pricing applies to accredited organizations and exam administrators. Fees were not confirmed from search results.

See current prices on iassc.org

IASSC doesn't publish a full plan list, so we show what it does publish. Confirm prices with the vendor.

Strengths and limitations

What stands out, and what to watch

Strengths

Exams are separate from training, so candidates can study with any provider
Covers Yellow, Green and Black Belt plus lean-only certifications
On-demand web-based testing
Public certificate verification page
Published Body of Knowledge for each exam

Limitations

No training included; courses must come from another provider
Exam fees not confirmed from search results
Exam length and format details not confirmed in this check
An IASSC FAQ addresses whether a certificate from an accredited provider equals IASSC certification, so check what your provider issues

Based on the publisher's own description, not a full review.

Fit

Is IASSC right for your team?

A good fit if…

You want a certificate that does not depend on one training company
Your staff trained in-house and now need an external exam
You hire for Lean Six Sigma roles and want to verify certificates
You train others and want to become an accredited provider

Look elsewhere if…

You want training and certification bundled in one course
You need a project-based certification that reviews a completed improvement project

Support and training

Support: Email, Help center
Training: Docs
Deployment: Online

Reviews

What IASSC users say

We haven't found published reviews of IASSC on G2 or Capterra yet. Smaller lean tools often have none, so judge it on the facts above and a trial.

Similar tools

IASSC alternatives

ASQ

Published pricing

Quality professional association offering Six Sigma belt certifications, question banks and online exam prep.

DMAICSPCQuality management

Council for Six Sigma Certification

Free plan + paid

Certification body providing free self-study Six Sigma guides alongside paid belt exams.

DMAICLean Six Sigma

Gemba Academy

Price on request

Video-based lean, Six Sigma and leadership training library with optional hosted LMS and belt certifications.

5SKaizenVSM

GoLeanSixSigma.com

Free plan + paid

Online Lean Six Sigma training and certification from White Belt to Black Belt, plus free templates.

DMAICVSMSPC

IASSC compared with ASQ, Council for Six Sigma Certification, Gemba Academy, GoLeanSixSigma.com
Tool	Pricing	Starting price	Free plan or trial	Delivery
IASSC	Price on request	Not published	None listed	Online
ASQ	Published pricing	CSSGB exam fee $483 (members save $100)	None listed	Online
Council for Six Sigma Certification	Free plan + paid	White Belt free; Yellow Belt $99	Free plan	Online
Gemba Academy	Price on request	Not published	None listed	Online
GoLeanSixSigma.com	Free plan + paid	Free White Belt; all certifications for $499	Free plan	Online

From each vendor's published pricing. Check current prices on their sites.

FAQ

IASSC: common questions

What is IASSC?

IASSC is the International Association for Six Sigma Certification. It offers Lean Six Sigma certification exams and accredits training providers.

Does IASSC provide training?

No. IASSC certifies through exams. Training comes from separate providers, some of which IASSC accredits.

Which certifications does IASSC offer?

Yellow, Green and Black Belt, plus Lean Practitioner, Lean Leader and Lean Expert certifications.

Can I take the exam online?

Yes. IASSC offers on-demand web-based certification testing.

How can an employer check an IASSC certificate?

IASSC has a Verify a Certification page on its site.

How much do IASSC exams cost?

Exams are sold as vouchers per level on the IASSC order site. Fees were not confirmed in this check.

For the IASSC team

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